source: src/SymTab/Indexer.h @ fc638d2

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// Indexer.h --
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 21:38:55 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Wed Mar  2 17:34:14 2016
// Update Count     : 6
//

#ifndef INDEXER_H
#define INDEXER_H

#include <list>
#include <string>

#include "SynTree/Visitor.h"

namespace SymTab {
        class Indexer : public Visitor {
          public:
                explicit Indexer( bool useDebug = false );

                Indexer( const Indexer &that );
                Indexer( Indexer &&that );
                virtual ~Indexer();
                Indexer& operator= ( const Indexer &that );
                Indexer& operator= ( Indexer &&that );

                using Visitor::visit;
                virtual void visit( ObjectDecl *objectDecl );
                virtual void visit( FunctionDecl *functionDecl );
                virtual void visit( TypeDecl *typeDecl );
                virtual void visit( TypedefDecl *typeDecl );
                virtual void visit( StructDecl *aggregateDecl );
                virtual void visit( UnionDecl *aggregateDecl );
                virtual void visit( EnumDecl *aggregateDecl );
                virtual void visit( TraitDecl *aggregateDecl );

                virtual void visit( CompoundStmt *compoundStmt );

                virtual void visit( ApplicationExpr *applicationExpr );
                virtual void visit( UntypedExpr *untypedExpr );
                virtual void visit( NameExpr *nameExpr );
                virtual void visit( CastExpr *castExpr );
                virtual void visit( AddressExpr *addressExpr );
                virtual void visit( LabelAddressExpr *labAddressExpr );
                virtual void visit( UntypedMemberExpr *memberExpr );
                virtual void visit( MemberExpr *memberExpr );
                virtual void visit( VariableExpr *variableExpr );
                virtual void visit( ConstantExpr *constantExpr );
                virtual void visit( SizeofExpr *sizeofExpr );
                virtual void visit( AlignofExpr *alignofExpr );
                virtual void visit( UntypedOffsetofExpr *offsetofExpr );
                virtual void visit( OffsetofExpr *offsetofExpr );
                virtual void visit( OffsetPackExpr *offsetPackExpr );
                virtual void visit( AttrExpr *attrExpr );
                virtual void visit( LogicalExpr *logicalExpr );
                virtual void visit( ConditionalExpr *conditionalExpr );
                virtual void visit( CommaExpr *commaExpr );
                virtual void visit( TypeExpr *typeExpr );
                virtual void visit( AsmExpr *asmExpr );
                virtual void visit( UntypedValofExpr *valofExpr );
                virtual void visit( TupleExpr *tupleExpr );
                virtual void visit( TupleAssignExpr *tupleExpr );

                virtual void visit( TraitInstType *contextInst );
                virtual void visit( StructInstType *contextInst );
                virtual void visit( UnionInstType *contextInst );

                virtual void visit( ForStmt *forStmt );

                // when using an indexer manually (e.g., within a mutator traversal), it is necessary to tell the indexer
                // explicitly when scopes begin and end
                void enterScope();
                void leaveScope();

                /// Gets all declarations with the given ID
                void lookupId( const std::string &id, std::list< DeclarationWithType* > &out ) const;
                /// Gets the top-most type declaration with the given ID
                NamedTypeDecl *lookupType( const std::string &id ) const;
                /// Gets the top-most struct declaration with the given ID
                StructDecl *lookupStruct( const std::string &id ) const;
                /// Gets the top-most enum declaration with the given ID
                EnumDecl *lookupEnum( const std::string &id ) const;
                /// Gets the top-most union declaration with the given ID
                UnionDecl *lookupUnion( const std::string &id ) const;
                /// Gets the top-most trait declaration with the given ID
                TraitDecl *lookupTrait( const std::string &id ) const;

                void print( std::ostream &os, int indent = 0 ) const;
          private:
                /// looks up a specific mangled ID at the given scope
                DeclarationWithType *lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) const;
                /// returns true if there exists a declaration with C linkage and the given name with a different mangled name
                bool hasIncompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const;
                /// returns true if there exists a declaration with C linkage and the given name with the same mangled name
                bool hasCompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const;
                // equivalents to lookup functions that only look at tables at scope `scope` (which should be >= tables->scope)
                NamedTypeDecl *lookupTypeAtScope( const std::string &id, unsigned long scope ) const;
                StructDecl *lookupStructAtScope( const std::string &id, unsigned long scope ) const;
                EnumDecl *lookupEnumAtScope( const std::string &id, unsigned long scope ) const;
                UnionDecl *lookupUnionAtScope( const std::string &id, unsigned long scope ) const;
                TraitDecl *lookupTraitAtScope( const std::string &id, unsigned long scope ) const;

                void addId( DeclarationWithType *decl );
                void addType( NamedTypeDecl *decl );
                void addStruct( const std::string &id );
                void addStruct( StructDecl *decl );
                void addEnum( EnumDecl *decl );
                void addUnion( const std::string &id );
                void addUnion( UnionDecl *decl );
                void addTrait( TraitDecl *decl );

                struct Impl;
                Impl *tables;         ///< Copy-on-write instance of table data structure
                unsigned long scope;  ///< Scope index of this pointer
                bool doDebug;         ///< Display debugging trace?

                /// Takes a new ref to a table (returns null if null)
                static Impl *newRef( Impl *toClone );
                /// Clears a ref to a table (does nothing if null)
                static void deleteRef( Impl *toFree );

                // Removes matching autogenerated constructors and destructors
                // so that they will not be selected
                // void removeSpecialOverrides( FunctionDecl *decl );
                void removeSpecialOverrides( const std::string &id, std::list< DeclarationWithType * > & out ) const;

                /// Ensures that tables variable is writable (i.e. allocated, uniquely owned by this Indexer, and at the current scope)
                void makeWritable();
        };
} // namespace SymTab

#endif // INDEXER_H

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //